CN110425731A - A kind of SCR denitration Smoke-heating device for wearing circumferential weld obturator - Google Patents
A kind of SCR denitration Smoke-heating device for wearing circumferential weld obturator Download PDFInfo
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- CN110425731A CN110425731A CN201910763586.XA CN201910763586A CN110425731A CN 110425731 A CN110425731 A CN 110425731A CN 201910763586 A CN201910763586 A CN 201910763586A CN 110425731 A CN110425731 A CN 110425731A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 74
- 239000003546 flue gas Substances 0.000 claims abstract description 74
- 238000007789 sealing Methods 0.000 claims abstract description 65
- 239000007789 gas Substances 0.000 claims abstract description 53
- 238000002485 combustion reaction Methods 0.000 claims abstract description 30
- 230000001105 regulatory effect Effects 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- 239000000779 smoke Substances 0.000 claims abstract description 21
- 230000007704 transition Effects 0.000 claims abstract description 10
- 238000005453 pelletization Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 11
- 235000019504 cigarettes Nutrition 0.000 claims description 5
- 230000008602 contraction Effects 0.000 claims description 4
- 239000008246 gaseous mixture Substances 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 210000000038 chest Anatomy 0.000 claims description 2
- 239000000463 material Substances 0.000 description 8
- 238000005245 sintering Methods 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/025—Air heaters with forced circulation using fluid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
- F24H9/1877—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1881—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2064—Arrangement or mounting of control or safety devices for air heaters
- F24H9/2085—Arrangement or mounting of control or safety devices for air heaters using fluid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Furnace Details (AREA)
- Chimneys And Flues (AREA)
Abstract
A kind of SCR denitration Smoke-heating device for wearing circumferential weld obturator, belongs to denitration technical field of heating.Device includes Combustion System of Hot-Blast Stove and controling of the pressure of the oven system；Combustion System of Hot-Blast Stove includes combustion fan, combustion-supporting air pipe, flammable air pipe, burner etc.；Combustion fan is connect by combustion-supporting air pipe with burner, and igniter is located at the air inlet of hot-blast furnace body burner；Controling of the pressure of the oven system mainly includes hearth of hot-blast stove section converging transition, louvered smokestack regulating valve, hot-blast stove high-temperature flue gas outlet flue etc.；Section converging transition is located at hearth of hot-blast stove leading portion, and seal fan entrance passes through former smoke impervious gas piping, neat stress sealing gas pipeline is connect with SCR denitration reaction device gas approach, SCR denitration reaction device exhaust pass respectively.The advantage is that being conducive to that high-temperature flue gas is avoided directly to accelerate flowing inside burner hearth, the flow resistance of high-temperature flue gas is effectively increased.
Description
Technical field
The invention belongs to steel industry sintering, pelletizing flue gas SCR denitration technical field of heating, in particular to a kind of to match band
Stitch the SCR denitration Smoke-heating device of obturator.
Background technique
A large amount of industrial smoke is produced in Production Process for Steel Enterprise, mainly includes particulate matter, SO2、NOx, HF, two dislike
The solid contaminants such as a variety of harmful gaseous pollutants such as English and iron dust containing, heavy metal, seriously destroy ecological environment.Wherein burn
The NO that knot, pelletizing process dischargexUp to entire steel mill NOxMore than half of total emission volumn.In traditional Production Process for Steel Enterprise
Industrial smoke is directly discharged in atmosphere after desulfurization, dedusting, UTILIZATION OF VESIDUAL HEAT IN, does not carry out denitration process.As steel is looked forward to
Industry minimum discharge requires increasingly strict, and sintering, pelletizing flue gas carry out denitration process and have become the most important thing.
SCR denitration technology as current one of the most mature, most widely used denitrating technique, it have denitration efficiency it is high,
The advantages that stable, technically reliable, steel industry sintering at home and abroad, the improvement of pelletizing denitrating flue gas have had successful application.
It is general lower (100~160 DEG C) in view of sintering, pelletizing flue-gas temperature, it is difficult to reach the optimum activity of SCR denitration process catalyst
Temperature (280~330 DEG C).Therefore sintering, pelletizing flue gas SCR denitration system usually require configuration hot wind stove heating low temperature original cigarette
Gas, window reaction temperature needed for being warming up to SCR denitration.It is existing sintering, pelletizing low temperature original flue gas routine add
Hot method is that the high-temperature hot-air of hot-blast stove production is passed directly into SCR denitration reaction device entrance vertical gas pass, and it is straight to belong to direct combustion
Mixed mode.Since SCR denitration flue system is generally in high negative pressure operating condition (- 6500~-8000Pa), and hearth of hot-blast stove,
Operating pressure needed for burner operates normally is only -1000Pa, is often existed inside hearth of hot-blast stove in actual moving process
Negative pressure is excessive, it is difficult to which the problem of maintaining continued stable combustion seriously affects the heating efficiency of sintering, pelletizing low temperature original flue gas, shadow
Ring normal production.
Summary of the invention
The purpose of the present invention is to provide a kind of SCR denitration Smoke-heating devices for wearing circumferential weld obturator, using more
Weight controling of the pressure of the oven technology efficiently solves hot-blast stove and continues under denitration flue gas system high negative pressure environment (- 6500~-8000Pa)
The problem of stablizing burning.The tiny structure combustion conditions inside hearth of hot-blast stove are maintained, denitration reaction efficiency is improved.
A kind of SCR denitration Smoke-heating device for wearing circumferential weld obturator, including Combustion System of Hot-Blast Stove and furnace pressure control
System processed.Combustion System of Hot-Blast Stove includes combustion fan 1, combustion-supporting air pipe 2, flammable air pipe 5, burner 8, igniter 9, heat
Wind furnace main body 10；Combustion fan 1 is connect by combustion-supporting air pipe 2 with burner 8, and blast furnace gas passes through flammable air pipe 5 and combustion
Burner 8 connects, and igniter 9 is located at the air inlet of hot-blast furnace body burner 8；Controling of the pressure of the oven system mainly includes hot-blast stove furnace
Thorax section converging transition 11, sealing circumferential weld 1, sealing circumferential weld 2 13, sealing circumferential weld 3 14, louvered smokestack regulating valve 15, hot wind
Furnace high-temperature flue gas outlet flue 16, high speed nozzle 17, seal fan 24, former smoke impervious gas piping 20, neat stress blanket gas
Body pipeline 22 and fan outlet sealing gas pipeline 27；Section converging transition 11 is arranged in hearth of hot-blast stove leading portion, section of burner hearth face
Product is gradually reduced；Circumferential weld 1, sealing circumferential weld 2 13 and sealing circumferential weld 3 14 is sealed to be arranged in hearth of hot-blast stove middle section, sealing air
24 entrance of machine pass through former smoke impervious gas piping 20, neat stress sealing gas pipeline 22 respectively with SCR denitration reaction device entrance
Flue 18, SCR denitration reaction device exhaust pass 19 connect；The outlet of seal fan 24 passes through sealing gas pipeline 27 and three seals
The connection of circumferential weld side；Hearth of hot-blast stove outlet is connect with 15 entrance of louvered smokestack regulating valve, and louvered smokestack regulating valve 15 goes out
Mouth is connect by hot-blast stove high-temperature hot-air exhaust pass 16 with high speed nozzle 17, and high speed nozzle 17 is located at SCR denitration reaction device and enters
Mouth 18 leading portion of flue.
The sealing circumferential weld 1, sealing circumferential weld 2 13 and sealing 3 14 material high temperature resistant of circumferential weld, the strong material of thermal stability
Material, adjacent twice circumferential weld spacing are 0.6m, and into circumferential weld, introducing portion SCR denitration system original flue gas or neat stress form air curtain
Sealant increases big burner hearth inside smoke flow resistance.
High speed nozzle 17 in the denitration gas approach uses Lavalle gradual shrinkage form, selects high temperature resistant, thermostabilization
The strong material of property.
The application method of above-mentioned heating device, specific step and parameter are as follows:
1, start hot wind furnace main body 10, blast furnace gas and combustion air are passed through burner 8, and two strands of gaseous mixtures pass through burning
The igniter 9 that device 8 configures is lighted and full combustion generates high-temperature flue gas inside hearth of hot-blast stove；
2, the high-temperature flue gas outlet direction of burner 8 uses vertical runs, and high-temperature flue gas is avoided directly to add inside burner hearth
Speed flowing, increases by 800~1000Pa of smoke flow resistance；
3, it when the high-temperature flue gas that burner 8 flows out diffuses to section of burner hearth contraction section 11, is shunk and is increased by section of burner hearth
1000~1500Pa of flue gas throttle resistance；
4, it when sealing gas uses denitration original flue gas, closes butterfly valve 3 23, open butterfly valve 2 21, butterfly valve 4 25 and regulating valve
3 26, start seal fan 24, will partially sinter, pelletizing denitration original flue gas is passed through sealing circumferential weld 1, sealing 2 13 and of circumferential weld
Three air curtains are formed in sealing circumferential weld 3 14, increase by 3000~3500Pa of inner flue gas of the stove flow resistance；Sealing gas is using de-
When nitre neat stress, butterfly valve 2 21 is closed, opens butterfly valve 3 23, butterfly valve 4 25 and regulating valve 3 26, starts seal fan 24, by portion
Point sintering, pelletizing denitration neat stress be passed through sealing circumferential weld 1, sealing circumferential weld 2 13 and sealing circumferential weld 3 14 in formed three sky
Air curtain increases by 3000~3500Pa of inner flue gas of the stove flow resistance；
5, valve throttle of the hot-blast stove high-temperature flue gas outlet Jing Guo louvered smokestack regulating valve 15 increases smoke flow resistance
500~2000Pa；
6, the high speed nozzle 17 that hot-blast stove high-temperature flue gas is passed through in SCR denitration reaction device gas approach 18 forms high rapid fire
Stream, be conducive to improve high-temperature flue gas and low temperature original flue gas mixing rate, while increase high-temperature flue gas flow resistance 1600~
2000Pa。
The present invention has the advantages that
1, the high-temperature flue gas outlet direction of hot-blast stove gas burner uses vertical runs, is conducive to avoid high-temperature flue gas in burner hearth
It is internal directly to accelerate flowing, increase smoke flow resistance, it is ensured that combustible gas full combustion inside burner hearth.
2, section converging transition is arranged in hearth of hot-blast stove leading portion, shrinks throttling using section of burner hearth and increases furnace high-temperature flue gas stream
Dynamic resistance.
3, three seals circumferential weld is arranged in hearth of hot-blast stove middle section, by circumferential weld seal fan by partial denitrification original flue gas or only
Flue gas is pumped to circumferential weld and forms three air curtains, utilizes the circulating face of air curtain sealing principle limitation burner hearth internal high temperature flue gas
Product interlocks with furnace internal pressure and realizes dynamic regulation, effectively increases the flow resistance of high-temperature flue gas.
4, louvered smokestack regulating valve is arranged in hot-blast stove high-temperature flue gas outlet, automatically adjusts cigarette according to pressure difference before and after regulating valve
Throughput increases smoke flow resistance using valve throttle.
5, high speed nozzle is set in SCR denitration reaction device gas approach, utilizes the architectural characteristic shape of the dynamic and static pressure conversion of nozzle
At high-speed jet, is increasing smoke flow resistance simultaneously, by the Involving velocity of nozzle at high speeds jet stream, considerably increasing high warm
The mixing rate and mixed flue-gas temperature uniformity of wind and low temperature original flue gas, and then improve denitration efficiency.
6, sealing gas can be had while balancing furnace internal pressure using denitrating system original flue gas or neat stress
Conducive to hot-blast stove high-temperature flue gas outlet temperature is reduced, enhance the temperature mixing uniformity of high-temperature flue gas and low temperature original flue gas, improves
Denitration efficiency.
7, it is laid by burner outlet direction, section of burner hearth contraction, circumferential weld obturator, louvered smokestack regulating valve,
The multiple furnace pressure control means such as high speed nozzle, effectively blocked the external unfavorable operating condition of SCR denitration flue system high negative pressure (-
6500~-8000Pa) influence to furnace internal pressure, it ensure that the safety of hot-blast stove sustained combustion under high negative pressure environment
And stability.
Detailed description of the invention
Fig. 1 is present apparatus overall structure diagram.Wherein, combustion fan 1, combustion-supporting air pipe 2, butterfly valve 1, regulating valve one
4, flammable air pipe 5, repid cut-off valve 6, regulating valve 27, burner 8, igniter 9, hot wind furnace main body 10, section converging transition
11, circumferential weld 1, sealing circumferential weld 2 13, sealing circumferential weld 3 14, louvered smokestack regulating valve 15, hot-blast stove high-temperature hot-air is sealed to go out
Mouth flue 16, high speed nozzle 17, SCR denitration reaction device gas approach 18, SCR denitration reaction device exhaust pass 19, former flue gas are close
It seals gas piping 20, butterfly valve 2 21, neat stress sealing gas pipeline 22, butterfly valve 3 23, seal fan 24, butterfly valve 4 25, adjust
Valve 3 26, fan outlet sealing gas pipeline 27.
Specific embodiment
A kind of SCR denitration Smoke-heating device for wearing circumferential weld obturator, including Combustion System of Hot-Blast Stove and furnace pressure control
System processed.Combustion System of Hot-Blast Stove includes combustion fan 1, combustion-supporting air pipe 2, flammable air pipe 5, burner 8, igniter 9, heat
Wind furnace main body 10；Combustion fan 1 is connect by combustion-supporting air pipe 2 with burner 8, and blast furnace gas passes through flammable air pipe 5 and combustion
Burner 8 connects, and igniter 9 is located at the air inlet of hot-blast furnace body burning 8；Controling of the pressure of the oven system mainly includes hearth of hot-blast stove
Section converging transition 11, sealing circumferential weld 1, sealing circumferential weld 2 13, sealing circumferential weld 3 14, louvered smokestack regulating valve 15, hot-blast stove
High-temperature flue gas outlet flue 16, high speed nozzle 17, seal fan 24, former smoke impervious gas piping 20, neat stress sealing gas
Pipeline 22 and fan outlet sealing gas pipeline 27；Section converging transition 11 is arranged in hearth of hot-blast stove leading portion, section of burner hearth area
It is gradually reduced；Circumferential weld 1, sealing circumferential weld 2 13 and sealing circumferential weld 3 14 is sealed to be arranged in hearth of hot-blast stove middle section, seal fan
24 entrances pass through former smoke impervious gas piping 20, neat stress sealing gas pipeline 22 respectively with SCR denitration reaction device entrance cigarette
Road 18, SCR denitration reaction device exhaust pass 19 connect；The outlet of seal fan 24 passes through sealing gas pipeline 27 and three seals ring
Stitch side connection；Hearth of hot-blast stove outlet is connect with 15 entrance of louvered smokestack regulating valve, and louvered smokestack regulating valve 15 exports
It is connect by hot-blast stove high-temperature hot-air exhaust pass 16 with high speed nozzle 17, high speed nozzle 17 is located at SCR denitration reaction device entrance
18 leading portion of flue.
The sealing circumferential weld 1, sealing circumferential weld 2 13 and sealing 3 14 material high temperature resistant of circumferential weld, the strong material of thermal stability
Material, adjacent twice circumferential weld spacing are 0.6m, and into circumferential weld, introducing portion SCR denitration system original flue gas or neat stress form air curtain
Sealant increases big burner hearth inside smoke flow resistance.
High speed nozzle 17 in the denitration gas approach uses Lavalle gradual shrinkage form, selects high temperature resistant, thermostabilization
The strong material of property.
The application method of above-mentioned heating device, specific step and parameter are as follows:
1, start hot wind furnace main body 10, blast furnace gas and combustion air are passed through burner 8, and two strands of gaseous mixtures pass through burning
The igniter 9 that device 8 configures is lighted and full combustion generates high-temperature flue gas inside hearth of hot-blast stove；
2, the high-temperature flue gas outlet direction of burner 8 uses vertical runs, and high-temperature flue gas is avoided directly to add inside burner hearth
Speed flowing, increases smoke flow resistance 890Pa；
3, it when the high-temperature flue gas that burner 8 flows out diffuses to section of burner hearth contraction section 11, is shunk and is increased by section of burner hearth
Flue gas throttle resistance 1200Pa；
4, it when sealing gas uses denitration original flue gas, closes butterfly valve 3 23, open butterfly valve 2 21, butterfly valve 4 25 and regulating valve
3 26, start seal fan 24, will partially sinter, pelletizing denitration original flue gas is passed through sealing circumferential weld 1, sealing 2 13 and of circumferential weld
Three air curtains are formed in sealing circumferential weld 3 14, increase inner flue gas of the stove flow resistance 3100Pa；Sealing gas uses the net cigarette of denitration
When gas, butterfly valve 2 21 is closed, opens butterfly valve 3 23, butterfly valve 4 25 and regulating valve 3 26, starts seal fan 24, part is burnt
Knot, pelletizing denitration neat stress are passed through in sealing circumferential weld 1, sealing circumferential weld 2 13 and sealing circumferential weld 3 14 and form three air curtains,
Increase inner flue gas of the stove flow resistance 3100Pa；
5, valve throttle of the hot-blast stove high-temperature flue gas outlet Jing Guo louvered smokestack regulating valve 15 increases smoke flow resistance
1600Pa；
6, the high speed nozzle 17 that hot-blast stove high-temperature flue gas is passed through in SCR denitration reaction device gas approach 18 forms high rapid fire
Stream is conducive to the mixing rate for improving high-temperature flue gas and low temperature original flue gas, while increasing high-temperature flue gas flow resistance 1860Pa.
Claims (4)
1. a kind of SCR denitration Smoke-heating device for wearing circumferential weld obturator, which is characterized in that including Combustion System of Hot-Blast Stove
With controling of the pressure of the oven system；Combustion System of Hot-Blast Stove includes combustion fan (1), combustion-supporting air pipe (2), flammable air pipe (5), burning
Device (8), igniter (9), hot wind furnace main body (10)；Combustion fan (1) is connect by combustion-supporting air pipe (2) with burner (8), high
Producer gas is connect by flammable air pipe (5) with burner (8), and igniter (9) is located at the air inlet of hot-blast furnace body burner (8)
At mouthful；Controling of the pressure of the oven system include hearth of hot-blast stove section converging transition (11), sealing circumferential weld one (12), sealing circumferential weld two (13),
Seal circumferential weld three (14), louvered smokestack regulating valve (15), hot-blast stove high-temperature flue gas outlet flue (16), high speed nozzle (17),
Seal fan (24), former smoke impervious gas piping (20), neat stress sealing gas pipeline (22) and fan outlet sealing gas
Pipeline (27)；Section converging transition (11) is arranged in hearth of hot-blast stove leading portion；Sealing circumferential weld one (12), sealing are circumferential weld two (13) and close
Seal ring stitches three (14) setting in hearth of hot-blast stove middle section, seal fan (24) entrance pass through former smoke impervious gas piping (20),
Neat stress sealing gas pipeline (22) respectively with SCR denitration reaction device gas approach (18), SCR denitration reaction device exhaust pass
(19) it connects；Seal fan (24) outlet is connect by sealing gas pipeline (27) with three seals circumferential weld side；Hot-blast stove furnace
Thorax outlet is connect with louvered smokestack regulating valve (15) entrance, and louvered smokestack regulating valve (15) outlet is warmed by hot-blast stove height
Wind exhaust pass (16) is connect with high speed nozzle (17), before high speed nozzle (17) is located at SCR denitration reaction device gas approach (18)
Section.
2. the apparatus according to claim 1, which is characterized in that the sealing circumferential weld one (12), sealing circumferential weld two (13) and
It seals circumferential weld three (14), adjacent twice circumferential weld spacing is 0.6m, introducing portion SCR denitration system original flue gas or net cigarette into circumferential weld
Gas forms air curtain sealant, increases big burner hearth inside smoke flow resistance.
3. the apparatus according to claim 1, which is characterized in that the high speed nozzle (17) in the denitration gas approach uses
Lavalle gradual shrinkage form.
4. the apparatus according to claim 1, which is characterized in that the application method of described device, specific step and parameter is such as
Under:
1) start hot wind furnace main body (10), blast furnace gas and combustion air are passed through burner (8), and two strands of gaseous mixtures pass through burning
The igniter (9) of device (8) configuration is lighted and full combustion generates high-temperature flue gas inside hearth of hot-blast stove；
2) the high-temperature flue gas outlet direction of burner (8) uses vertical runs, and high-temperature flue gas is avoided directly to accelerate inside burner hearth
Flowing increases by 800~1000Pa of smoke flow resistance；
3) it when the high-temperature flue gas of burner (8) outflow diffuses to section of burner hearth contraction section (11), is shunk and is increased by section of burner hearth
1000~1500Pa of flue gas throttle resistance；
4) when sealing gas uses denitration original flue gas, butterfly valve three (23) are closed, butterfly valve two (21), butterfly valve four (25) is opened and adjusts
Valve three (26) starts seal fan (24), will partially sinter, pelletizing denitration original flue gas is passed through sealing circumferential weld one (12), sealing ring
It stitches in two (13) and sealing circumferential weld three (14) and forms three air curtains, increase by 3000~3500Pa of inner flue gas of the stove flow resistance；It is close
It when sealing gas using denitration neat stress, closes butterfly valve two (21), opens butterfly valve three (23), butterfly valve four (25) and regulating valve three
(26), start seal fan (24), will partially sinter, pelletizing denitration neat stress is passed through sealing circumferential weld one (12), sealing circumferential weld two
(13) and in sealing circumferential weld three (14) three air curtains are formed, 3000~3500Pa of inner flue gas of the stove flow resistance is increased；
5) valve throttle of the hot-blast stove high-temperature flue gas outlet Jing Guo louvered smokestack regulating valve (15) increases smoke flow resistance
500~2000Pa；
6) hot-blast stove high-temperature flue gas is passed through the high speed nozzle (17) in SCR denitration reaction device gas approach (18) and forms high rapid fire
Stream, be conducive to improve high-temperature flue gas and low temperature original flue gas mixing rate, while increase high-temperature flue gas flow resistance 1600~
2000Pa。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910763586.XA CN110425731B (en) | 2019-08-16 | 2019-08-16 | SCR denitration flue gas heating device with circular seam sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910763586.XA CN110425731B (en) | 2019-08-16 | 2019-08-16 | SCR denitration flue gas heating device with circular seam sealing device |
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| CN110425731A true CN110425731A (en) | 2019-11-08 |
| CN110425731B CN110425731B (en) | 2024-04-02 |
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| CN201910763586.XA Active CN110425731B (en) | 2019-08-16 | 2019-08-16 | SCR denitration flue gas heating device with circular seam sealing device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060234173A1 (en) * | 2005-04-13 | 2006-10-19 | Smith John W | Carrier air heating system for SCR |
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